diff --git a/mozilla/js/rhino/org/mozilla/javascript/ScriptRuntime.java b/mozilla/js/rhino/org/mozilla/javascript/ScriptRuntime.java
index 7867707d4cc..3e88cfdf43f 100644
--- a/mozilla/js/rhino/org/mozilla/javascript/ScriptRuntime.java
+++ b/mozilla/js/rhino/org/mozilla/javascript/ScriptRuntime.java
@@ -287,7 +287,7 @@ public class ScriptRuntime {
             // check for "Infinity"
             if (startChar == '+' || startChar == '-')
                 start++;
-            if (s.regionMatches(start, "Infinity", 0, 9))
+            if (s.regionMatches(start, "Infinity", 0, 8))
                 return startChar == '-'
                     ? Double.NEGATIVE_INFINITY
                     : Double.POSITIVE_INFINITY;
diff --git a/mozilla/js/rhino/src/org/mozilla/javascript/ScriptRuntime.java b/mozilla/js/rhino/src/org/mozilla/javascript/ScriptRuntime.java
index 7867707d4cc..3e88cfdf43f 100644
--- a/mozilla/js/rhino/src/org/mozilla/javascript/ScriptRuntime.java
+++ b/mozilla/js/rhino/src/org/mozilla/javascript/ScriptRuntime.java
@@ -287,7 +287,7 @@ public class ScriptRuntime {
             // check for "Infinity"
             if (startChar == '+' || startChar == '-')
                 start++;
-            if (s.regionMatches(start, "Infinity", 0, 9))
+            if (s.regionMatches(start, "Infinity", 0, 8))
                 return startChar == '-'
                     ? Double.NEGATIVE_INFINITY
                     : Double.POSITIVE_INFINITY;